Batman: Gotham by Gaslight is a 2018 animated movie produced by Warner Bros Animation and DC Entertainment and is based on a one-off graphic novel by Brian Augustyn and Mike Mignola (originally published in 1989). The story forms part of the DC Else World series which places known characters in different timelines or realities and does not form part of the main DC universe continuity.
The story takes place in a Victorian era Gotham city sometime in the 19th century, which is strongly styled after London during the Victorian times. The story revolves around a killer, Jack the Ripper, who is terrorizing Gotham city and how the Batman is trying to apprehend him.
Various familiar characters make an appearance such as Poison Ivy, James Gordon and Hugo Strange, but they all take on different roles than the ones we know them for. For example, young Tim Drake, Dick Grayson and Jason Todd are in a street gang known as the Robins.
The movie is beautifully animated as with most DC animated movies and the voice acting is outstanding, Bruce Wayne\Batman is voiced by Bruce Greenwood, who does an exceptional job, however I do always find it slightly jarring when Batman is voiced by anyone other than Kevin Conroy.
This movie is immensely engaging and does a great job of bringing the graphic novel to life. It does have a major plot twist, that I will not spoil, that adds a real sense of surprise to how the story ends.
It is a great movie for Batman and DC Animated Universe fans and is a really enjoyable watching experience.